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Have you watched 3D-animated Disney flicks like Big Hero 6 and wondered how some of its scenes manage to look surprisingly realistic? Today's your lucky day: Disney has posted a top-level explanation of how its image rendering engine, Hyperion, works its movie magic. The software revolves around "path tracing," an advanced ray tracing technique that calculates light's path as it bounces off objects in a scene. It takes into account materials (like Baymax's translucent skin), and saves valuable time by bundling light rays that are headed in the same direction -- important when Hyperion is tracking millions of rays at once. The technology is efficient enough that animators don't have to 'cheat' when drawing very large scenes, like BH6's picturesque views of San Fransokyo. Although Disney's tech still isn't perfectly true to life, it's close enough that the studio might just fool you in those moments when it strives for absolute accuracy.

Hitchbot might have made it across Canada, but it appears that the US wasn't quite so kind to this mechanical traveler. The hitchhiking robot's American journey has ended after a mere two weeks thanks to a vandal attack in Philadelphia. While the team behind Hitchbot vows that its experiments with artificial intelligence and human interaction are "not over," it's clear that this nomad isn't about to resume its cross-America trek all that quickly. You'll hear more details on August 5th -- here's hoping that this includes plans for Hitchbot to bum rides once again, whether it's in the States or abroad.

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Honda has always been more than a car company. In addition to its car and motorcycle business, it also manufacturers marine vehicles, generators, a weird robot and even planes. To keep that spirit of just making as much stuff as possible alive it introduced the Uni-Cub personal mobility system in May 2012. It's been refined since then, but it's still not something you can run down the dealer and purchase. Honda is looking to developers to expand the its use cases beyond rolling you around a museum with an upcoming API for the rolling bar stool.

It's sometimes hard to keep track of positions in an IndyCar race, especially if you're in the stands and don't have the luxury of a broadcaster or data stream to point things out. Never fear, though: as of this weekend, the league's cars are carrying LED panels that display the driver's race position in real-time by working in conjunction with timing lines embedded in the tracks. They're also smart enough to switch to pit stop times, so you'll know if that tire swap is running too long.

Already immersing yourself in Windows 10? Trying to block out the not-so-favorable memories of Windows 8? Good for you. This week involved a new smartphone from a new challenger, and several new smartphone from a once-dominant player. And we don't mean Nokia, which was busy dipping its toes into the world of VR cameras. Because of course.

Amazon released the Alexa Appkit last month in hopes that developers will create cool new features for the voice technology that powers the Echo. This time, the e-commerce giant is offering the Alexa Voice Service (AVS) itself as a developer preview, which both hobbyists and legit hardware manufacturers can integrate into their own connected devices. The best part is the company's allowing the use of its technology for free. "By adding Alexa to your device, your users can request and receive information in the same way they would from an Amazon Echo," the company's Getting Started Guide reads. That means devices loaded with Alexa will also be able to answer questions about the weather and look up stuff or the traffic conditions online.

You can already access your Dropbox files on all your PCs and mobile gadgets, but what if you want to put them on your TV? If you have a Roku player, you're set. Roku has launched a Dropbox channel that lets you browse your photos and videos on its set-tops, including in slideshows. Yes, you now have an easy way to recap your vacation on a big screen without turning to other cloud services. The channel isn't flawless -- TechCrunchnotes that you can't play long videos, so this won't work if you're trying to stream full-length movies. Even so, it's a big help if you'd rather not have everyone gather around your computer to see your snapshots.

Folks in Japan might find themselves chatting with Pepper robots in business establishments these coming years. The enterprise version of the gentle-looking humanoid machine will be available for pre-order starting on October 1st, 2015, and businesses in the country can rent one directly from SoftBank. The carrier's robotics division is offering a $444-per-month, 3-year contract to interested parties, which means they'll end up paying around $16,000 within that period. Sadly, they'll have to return the unit once the contract's over.

You probably aren't a fan of showing up at the coffee shop right when there's a large line, or at the gym when there are no free machines. Wouldn't it be nice if you could find out how busy a place is at any given moment, without resorting to estimates? The new Density sensor might help. The tiny infrared detector is effectively a smarter, more connected pedestrian traffic sensor: it tells apps how many people are entering or leaving a building at any moment, giving you a good sense of whether that restaurant is packed or blissfully empty. Shops can use that data to their advantage, too. They can offer discounts whenever it gets quiet, or notify you the moment there's a free seat.

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